JPH05289212A - Laser recording method - Google Patents

Abstract

PURPOSE:To increase scanning speed while keeping fixed image density and to prevent an image from being spoiled by a scratch, etc., in a method for recording an image on a photosensitive material for laser recording. CONSTITUTION:An antihalation layer, a photosensitive layer and a protective layer are respectively provided on both sides of a supporting body in order. The respective photosensitive layers of the photosensitive material 10 for laser recording are scanned with individual laser beams carrying the same image information by respective laser scanning recording units 20 and 30 from both sides, thereby recording the image so that the same image information may be superposed on the respective photosensitive layers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording an image on a laser recording photosensitive material which is sensitive to laser light, and more specifically to a laser recording photosensitive material having a layer sensitive to laser light on both sides thereof. The present invention relates to an image recording method.

[0002]

2. Description of the Related Art Conventionally, an image recording system using a photosensitive material for laser recording such as a silver halide photosensitive material which scans and exposes a laser beam has been widely put to practical use in a scanning recording apparatus such as a laser printer. For example, in medical image recording, the number of medical images has been increasing with the development of new diagnostic modalities. In the diagnostic device used here, an image electrically formed by using a computer is diagnosed on a CRT. In addition, an image is recorded on the photosensitive material as a hard copy by a laser scanning recording device. In such a laser scanning recording device, laser light emitted from a laser light source is modulated by an electric signal representing the density and shape of the original image, and then reflected and polarized by an optical deflector such as a rotating polygon mirror to form an fθ lens. The laser light is carried by being scanned by a focusing lens such as a laser recording medium, which is fed at a constant speed in a direction (sub-scanning direction) perpendicular to the polarization direction (main-scanning direction) and is scanned. It is configured to record an image on the photosensitive material. Since such laser light scanning is performed only on one surface of the laser recording photosensitive material, this photosensitive material has a layer (photosensitive layer) which is sensitive to the laser light on one surface thereof.

In recent years, the usefulness of this laser scanning recording apparatus has been recognized, and many images have been recorded and stored on a photosensitive material for laser recording. Therefore, it is desired to reduce the time required to record an image on a large amount of light-sensitive material and develop it. There is also a demand for miniaturization of this laser scanning recording device.

[0004]

At present, particularly in a laser scanning recording apparatus of the type directly connected to a developing processor, unless the speed of the developing processing is increased, the processing speed of the entire laser scanning recording apparatus should be increased. There is a problem that you can not. In a light-sensitive material having a photosensitive layer such as silver halide coated on one side as described above, since the processing reaction is carried out from one side, there is a limit to the progress time of the processing reaction depending on the thickness of the photosensitive layer. Since the photosensitive layer is provided on only one side, the photosensitive layer is liable to cause layer peeling due to scratches and the like, and there is a limit to this rapid processing. Further, since the photosensitive layer is provided only on one side, it is difficult to balance the curl between the surface provided with the photosensitive layer and the opposite surface.

In view of the above circumstances, the inventor of the present invention can rapidly perform development processing by providing a photosensitive layer on both sides of a laser recording photosensitive material and is resistant to some scratches, that is, Another proposal was a photosensitive material for laser recording, in which the image was not damaged by scratches and the like, and the curl balance was easier to obtain. An object of the present invention is to provide a laser recording method for recording an image on the photosensitive material.

[0006]

The laser recording method of the present invention comprises a photosensitive material for laser recording which comprises a support transparent to visible light and photosensitive layers provided on both sides of the support and sensitive to the laser light. In the method for recording an image on, each of the photosensitive layers is scanned with different laser beams carrying the same image information from both sides to form an image so that the same image information is overlapped on each photosensitive layer. It is characterized by recording.

Here, the support being transparent to visible light means that not only the image recorded on one screen when the photosensitive material is observed from one surface after recording images on both surfaces, , Which means that the image recorded on the other side is also observed. The light-sensitive material for laser recording of the present invention is obtained by dividing the light-sensitive layer of the conventional light-sensitive material (obtaining an image having the same density) into two, that is, a light-sensitive layer having a thickness half that of the conventional light-sensitive layer. Including such two provided on both sides of the support, in the case of such a light-sensitive material, the processing speed of the development process (development / fixing / washing / drying) can be accelerated,
Also, it is easy to achieve curl balance. Further, since the photosensitive layers are provided on both sides, even if one photosensitive layer is scratched or peeled, it is rare that the other photosensitive layer is also scratched or peeled at the same position, so that the image is not affected. Less
The occurrence of pressure marks is reduced.

In the above-mentioned recording method, the scanning with the laser beams A and B carrying the same image information from both sides onto the respective photosensitive layers on the A side and the B side may be performed from both sides at substantially the same time. You may do each separately. In the case of the former, for example, a laser scanning recording apparatus provided with one laser light source on the upper surface and one laser light source on the lower surface at which the photosensitive material is arranged (which emits laser beams A and B, respectively) is used. The photosensitive layer on the upper surface can be scanned with the laser light A, and the photosensitive layer on the surface B (the lower surface) can be scanned with the laser light B. In the latter case, a laser scanning recording device provided with two laser light sources (which emits lasers A and B respectively) is used to scan the photosensitive layer on the A surface (upper surface) of the photosensitive material with the laser light A, and then the photosensitive material is exposed. Invert material, then B
The laser beam B can be made to scan the photosensitive layer of the surface (it became the upper surface by reversal), or a laser scanning recording device provided with one laser light source (selectively emitting lasers A and B) is used. After scanning the laser beam A on the photosensitive layer on the A side (upper surface) of the photosensitive material, the photosensitive material is inverted and conveyed to the original position, and then on the photosensitive layer on the B side (which became the upper surface by the inversion). The laser beam B can also be scanned. However, considering the time required to record an image and the size of the apparatus, it is preferable to perform image recording almost at the same time. At this time, since the two laser beams are used even if the energy amount of the laser beam to be emitted is halved, the same energy amount is emitted, and the scanning speed can be increased.

Although not an essential feature of the present invention,
If necessary, in the two laser beams that sensitize each photosensitive layer of the photosensitive material, the laser beam for image output, which is required to have high sharpness and high responsiveness, and a peripheral portion of the image with a black frame (so-called black edge). It is also possible to use in combination with a laser beam having a low sharpness, which is used only for outputting the maximum density of the light-sensitive material for the purpose of covering.

The laser light source used here may be any laser light source, such as an infrared emitting semiconductor laser or He.
A laser using an —Ne laser, an argon laser, and a red light emitting semiconductor laser is particularly preferable because it can be easily downsized.

In the light-sensitive material used in the present invention, it is preferable to provide an anti-halation layer on each light-sensitive layer or on the light-sensitive layer on at least one side of the support. Further, the support may be mixed or impregnated. The antihalation layer may be divided into a plurality of layers such as an intermediate layer when a plurality of laser exposures are applied.

The light-sensitive material used in the present invention may be a so-called silver salt light-sensitive material or a non-silver salt light-sensitive material, but a light-sensitive material using a silver halide emulsion in the light-sensitive layer is preferable.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. Here, the light-sensitive material was a negative silver halide emulsion used in the light-sensitive layer.

Conventional photosensitive materials and photosensitive materials used in the present invention were prepared according to the steps 1 to 7 described later.

1. Preparation of silver halide emulsion (a) 40 g of gelatin was dissolved in 1 liter of water, and 3 g of potassium bromide and compound [I] were placed in a container heated at 55 ° C.

[0016]

[Chemical 1]

After adding 60 mg of pAg value in the reaction vessel
1,000 ml of an aqueous solution containing 200 g of silver nitrate while maintaining 7.0
And an aqueous solution of 140 g of potassium bromide containing potassium hexachloroiridium (III) at a molar ratio of 10 ^-7 to 1080 m
and 1 were added by the double jet method to prepare cubic monodisperse silver bromide grains having an average grain size of 0.35 μm. After desalting this emulsion, 71 g of gelatin was added, pH 6.0, pA
Sodium thiosulfate 3 mg, chloroauric acid 4 mg and 4-hydroxy-6-methyl-1,3,3a, in accordance with g8.5.
0.2 g of 7-tetrazaindene was added and chemically sensitized at 60 ° C. to obtain emulsion (a).

2. Preparation of coating liquid for milk: A container in which 850 g of emulsion a was weighed was heated to 40 ° C., and additives were added by the following method to prepare an emulsion coating liquid.

(Emulsion coating solution formulation a) a. Emulsion (a) 850 g b. Spectral sensitizing dye [II] 1.2 × 10 ^-4 mol c. Supersensitizer [XVI] 0.8 × 10 ⁻³ mol d. Shelf life improver [VI] 1 × 10 ^-3 morpho. To 7.5 g of polyacrylamide (molecular weight 40,000). Trimethylolpropane 1.6 g. Polystyrene sulfonate Na 2.4 g h. N, N'-ethylenebis- (vinyl sulfone acetamide) 1.2 g

[0020]

[Chemical 2]

3. Preparation of Surface Protective Layer Coating Solution for Emulsion Layer A container containing an appropriate amount of water was heated to 40 ° C., and additives were added according to the formulation shown below to prepare a coating solution.

(Formulation of Coating Solution for Surface Protection Layer of Emulsion Layer) a. Gelatin 100 g b. Polyacrylamide (molecular weight 40,000) 10 g c. Sodium polystyrene sulfonate (molecular weight 600,000) 0.6 g d. N, N'-ethylenebis- (vinyl sulfone acetamide) Adjust.

E. Polymethylmethacrylate fine particles (average particle size 2.0 μm) 2.2 g f. Sodium t-octylphenoxyethoxyethane sulfonate 1.2 g. _{C 16 H 33 O- (CH 2} CH 2 O) 10 -H 2.7 g Ji. Sodium polyacrylate 4 g Re. _{C 8 F 17 SO 3 K 70} mg j. _{C 8 F 17 SO 2 N (} C 3 H 7) (CH 2 CH 2 O) 4 (CH 2) 4 -SO 3 Na 70 mg Le. 4 ml of NaOH (1N). Methanol 60 ml 4. Preparation of Back Layer Coating Liquid A container containing an appropriate amount of water was heated at 40 ° C., and additives were added according to the formulation shown below to prepare a back layer coating liquid.

(Prescription of Back Layer Coating Liquid) (i) b. Gelatin 80 g b. Dye [VIII] 1.0 g c. Polystyrene sodium sulfonate 0.6 g d. Poly (ethiacrylate / methacrylic acid) latex 15g e. N, N'-ethylenebis- (vinyl sulfone acetamide) 4.3 g

[0025]

[Chemical 3]

5. Preparation of Antihalation Layer Coating Liquid An antihalation layer coating liquid was prepared by heating a container containing an appropriate amount of water at 40 ° C. and adding the additives in the formulation shown below.

(Prescription of Antihalation Layer Coating Solution) a. Gelatin 20 g b. Dye [VIII] 1.0 g c. Polystyrene sodium sulfonate 0.6 g d. N, N'-ethylene bis- (vinyl sulfone acetamide) 1.1 g 6. Preparation of Guc's surface protection layer coating solution A container containing an appropriate amount of water was heated to 40 ° C, and additives were added in the following formulation to prepare a coating solution.

(Prescription of Coating Solution for Surface Protective Layer of Bag) a. Gelatin 80 g b. Polystyrene sodium sulfonate 0.3 g c. N, N'-ethylenebis- (vinyl sulfone acetamide) 1.7 g d. Polymethylmethacrylate fine particles (average particle size 4.0 μm) 1.7 g e. Sodium t-octylphenoxyethoxyethane sulfonate 3.6 g f. NaOH (1N) 6 ml g. Sodium polyacrylate 2 g H. _{C 16 H 33 O- (CH 2} CH 2 O) 10 -H 3.6 g Li. Sodium polyacrylate 4 g Nu. C ₈ F ₁₇ SO ₃ K 50 mg ru. _{C 8 F 17 SO 2 N (} C 3 H 7) (CH 2 CH 2 O) 4 (CH 2) 4 -SO 3 Na 50 mg Wo. Methanol 130 ml 7. Preparation of Coated Sample FIG. 1 is a schematic sectional view showing an example of a laser recording photosensitive material used in the present invention and a conventional laser recording photosensitive material.

Each sample (a) to (e) with reference to FIG.
Will be explained. Since the samples (c) and (d) differ only in the thickness of the antihalation layer of the sample (b), those drawings are representative of the sample (b).

Sample (a) Back layer coating liquid (i)
(Coating amount of gelatin 2.5 g / m ²⁾ a back layer 4 of the surface protective layer coating solution together with (coating amount of gelatin 1 g / m ²⁾ 175
μm thick transparent polyethylene terephthalate support 1
One side was coated and dried so that the total coating amount of gelatin was 3.5 g / m ² . Following this, the emulsion coating solution A and the surface protective layer coating solution were applied to the other side of the support 1 at a coating Ag amount of 2.5 g / m ² and a gelatin coating amount of the surface protective layer 3 of 1 g / m 2. A sample was prepared by applying and drying so as to be ² . At this time, the amount of the hardener N, N'-ethylenebis- (vinylsulfoneacetamide) was 2.3% with respect to the total amount of gelatin.
It was set to be%.

Sample (b) The antihalation layer coating solution was applied on both sides of a transparent polyethylene terephthalate support 1 having a thickness of 175 μm so that the gelatin coating amount was 0.31 g / m ² on each side, and dried. The emulsion coating solution A and the surface protective layer coating solution were coated on both sides and dried. The coating Ag amount on each surface was 1.25 g / m ² , and the gelatin coating amount on each surface protection layer 3 was 1 g / m ² and dried.
N'-ethylenebis- (vinyl sulfone acetamide)
The amount was adjusted to 2.3% of the total gelatin amount.

Sample (c) The coating liquid of the antihalation layer of the sample (b) was applied to both surfaces of the support 1 so that the gelatin coating amount on each surface was 0.06 g / m ² and dried. It was prepared in the same manner as the sample (b).

Sample (d) The coating liquid for the antihalation layer of the sample (b) was applied to both surfaces of the support 1 so that the amount of gelatin coated on each surface was 0.03 g / m ² and dried. It was prepared in the same manner as the sample (b).

Sample (e) A sample (e) was prepared in the same manner as the sample (b) except that the coating liquid for the antihalation layer was not provided on both surfaces of the support 1.

Images were then recorded on these samples and each image was observed and evaluated.

8. Image recording Each of the coated samples (a) and (b) is 25.7 × 36.4 cm.
Cut to size. Use this sample (b) for GENERAL SCANNI
NG INC Line Scan Module LSM-13 type engine (5 mW GaA / As semiconductor laser incorporated) was incorporated into two units, and imagewise exposure was performed using a laser scanning recording apparatus which performs laser irradiation from both sides. A schematic diagram of this device is shown in FIG. Here, the light-sensitive material 10 of the present invention
(Sample (b) in this embodiment) is sandwiched by laser scanning recording units 20 and 30 from above and below.
This sample (a) is a Line Scan manufactured by GENERAL SCANNING INC.
Module LSM-13 type engine (5mW GaA / A
s semiconductor laser incorporated) was used to expose the silver halide emulsion coated surface imagewise using a laser scanning recording device. These exposed coated samples (a), (b)
Then, a DryToDry30 "treatment with an increased development speed of an FPM4000 automatic developing machine manufactured by Fuji Photo Film Co. (Fuji RD-7 developer containing 35 ° C) was performed, and the development treatment was performed under the same conditions.

When the maximum density of the coated samples (a) and (b) after the development treatment was measured, the sample (a) was 2.50,
The sample (b) was 3.50.

Next, using the laser scanning recording apparatus described above, 6 CT images of the head were output for each sample. The highest density in the CT image was 2.00. In addition, the maximum density is output so that a so-called black edge (frame) is formed between the frames of the CT image.
At this time, the sample (b) had a higher density in the frame portion, and was favorable.

Next, the scanning speed of the GaA / As semiconductor laser of the laser scanning recording device which exposes the sample (a) to 1 /
2, the same amount of energy as that when laser irradiation was performed from both sides was given per 1 mm ² . This sample (a) was imagewise exposed using this laser scanning recording apparatus, and then automatically developed under the same conditions as described above. At this time, the maximum density of the sample (a) after development processing was 3.50. From this,
It was found that the scanning speed can be increased by making the photosensitive material double-sided.

Next, an image was recorded on each of the samples (c) to (e) in the same manner as the sample (b), and the sharpness was evaluated.

[0041]

[Table 1]

From this, it was found that the sharpness was increased by adding the antihalation layer. The amount of incident energy of laser light on the surface of one of the silver halide emulsions of the sample where the sharpness is practical is measured, and then the laser light at the interface between the other silver halide emulsion and the antihalation layer is measured. The amount of transmitted energy was measured. At this time, the amount of transmitted energy was 0.75 times the amount of incident energy.

It was also found that the sharpness gradually increases with the increase in the concentration of the antihalation layer. Here, when the amount of transmitted energy with respect to the amount of incident energy accompanying the increase in sharpness was measured as described above, it was found that this increase in sharpness remained almost unchanged when the amount of transmitted energy was 0.32 times the amount of incident energy or less. It was
Further, when the antihalation layer was thickened so that the amount of transmitted energy was 0.01 times or less of the amount of incident energy, the antihalation dye remained after the treatment, which was not preferable.

The components of the light-sensitive material used in the present invention will be described below.

The type of silver halide emulsion which is particularly preferably used in the present invention is any of silver halide emulsions such as negative latent and internal latent image type autopositives using a nucleating agent and precoating type autopositives using an electron capture agent. But it's okay.

The photosensitive silver halide used in the present invention is, for example, silver bromide, silver iodobromide, silver chloride, silver chlorobromide, silver chloroiodide,
Although it may be silver chloroiodobromide, etc., in particular, silver bromide, silver iodobromide,
Silver chlorobromide and silver chloroiodobromide are preferred. The silver iodide in the silver halide is preferably 0 to 4 mol%, particularly preferably 0 to 2 mol%. The silver chloride content in the silver halide is preferably 80 mol% or less, more preferably 40 mol% or less.

These emulsions preferably consist of emulsion grains having an average grain size (for example, measured by the projected area method or the number average method) of about 0.2 to 0.6 μ. An average particle size of 0.25 to 0.5 μ is more preferable. The emulsion may be a mixture of coarse particles and fine particles.

The particle shape is cubic, octahedron, tetradecahedral, potato-like, spherical, plate-like, or flat-plate-like having a particle size of 5 times or more the particle thickness (see Research Disclosure (RESE
ARCHDISCLOSURE) Item No.22534 p.20 ~ p.58 (1983 1
It may have an irregular crystal form such as described in the moon).
A substantially non-photosensitive emulsion (for example, an internally fogged fine grain emulsion) may be mixed with these photosensitive emulsions. Of course, they may be applied in separate layers.

Further, even if the crystal structure of the silver halide grains is uniform even in the inside, it has a layered structure in which the inside and the outside are different, and it is described in British Patent No. 635,841 and US Pat. No. 3,622,318. It may be a so-called conversion type as described above.

When the silver halide grains are formed, as a silver halide solvent for controlling the grain growth, for example, ammonia, rhodancali, rhodammone, thioether compounds (for example, US Pat. Nos. 3,271,157, 3,574,628 and 3574,628, No. 3,704,130, No. 4,297,439
No. 4,276,374, etc.) thione compounds (for example, JP-A-53-144319, JP-A-53-82408, JP-A-55-77737, etc.),
An amine compound (for example, JP-A-54-100717) can be used. In addition to the silver halide solvent, a compound that is adsorbed on the grain surface to control the crystal habit, such as a cyanine dye, a tetrazaindene compound, or a mercapto compound, can be used during grain formation.

The silver halide emulsion used in the present invention may be monodisperse or polydisperse, but monodispersion is preferred. Two or more kinds of monodisperse emulsions having different grain sizes may be mixed and used.

The emulsion of the present invention may be either a negative type or an autopositive type (internal latent image type using a nucleating agent, precoating type using an electron capture agent).

The silver halide emulsion of the light-sensitive material of the present invention may contain metal ions such as iridium ions.

For example, in order to contain iridium ions, it is common to add a water-soluble iridium compound (eg hexachloroiridium (IV) salt) in the form of an aqueous solution when preparing a silver halide emulsion. It may be added in the form of the same aqueous solution as the halide for grain formation,
It may be added before grain formation, during grain formation, or after grain formation until chemical sensitization, but particularly preferable is grain formation.

The negative emulsion used in the present invention is a chemical sensitizing method which is usually used, for example, sulfur sensitization (US Pat. Nos. 1,574,944, 2,278,947 and 3,021,215).
No. 3,635,717), reduction sensitization (US Patent No. 2,635,717)
518,698, Research Disclosure (Research D
isclosure) Vol.176 (1978.12) 17643, item 3, etc.), and sensitization with a thioether compound (for example, US Pat. No. 2,521,
No. 926, No. 3,021,215, No. 3,046,133, No. 3,1
65,552, 3,625,697, 3,635,717, and
No. 4,198,240), or various sensitizing methods that are a combination thereof.

Further specific chemical sensitizers include sodium thiosulfate and allyl thiocarbamide.
bamide), thiourea, thiosulfate, sulfur sensitizers such as thioether and cystine; reduction sensitizers such as tin chloride, phenylhydrazine and reductone.

Further, the negative type emulsion used in the present invention is gold sensitized (for example, US Pat. Nos. 2,540,085 and 2,2,085).
399,083 etc.) is preferably used. Specific gold sensitizers include potassium chloroaurate, aurasthiosulfate and potassium chloroparadate. These gold compounds may be added before or after the sulfur sensitizer. It can also be added at the same time as the sulfur sensitizer.

The amount of the gold sensitizer used in the present invention is preferably 10 ^-7 to 10 ^-3 mol, and more preferably 10 ^-6 to 10 ^-4 mol, per mol of silver halide. It is particularly preferable to use.

In order to provide both He-Ne laser (633 nm) and semiconductor laser (780 nm) with appropriate sensitivity, it is preferable to use a panchromatic sensitizing dye and an infrared sensitizing dye together. Also He
Two types of panchromatic sensitizing dyes are preferably used in order to make both the Ne laser (633 nm) and the semiconductor laser (678 nm) suitable for sensitivity.

The spectral sensitizer used in the present invention includes
Examples include infrared, panchromatic, ortho, and regular.

In the present invention, as the infrared spectral sensitizer, for example, at least one of tricarbocyanine dyes and / or 4-quinoline nucleus-containing dicarbocyanine dyes described in JP-A-63-89838 is used. Can be used. Further, those described in JP-A-59-192242 and JP-A-59-191032 are used.

Further, as a panchromatic sensitizing dye, Japanese Patent Publication No. 43-4
Those described in No. 933 and Japanese Patent Publication No. 60-45414 are used.

The above-mentioned spectral sensitizing dyes used in the present invention are 10 ^-7 to 10 ^-2 mol, preferably 10 ^-10 mol, per mol of silver halide.
It is contained in the silver halide photographic emulsion in a proportion of ^-6 to 10 ^-3 mol.

The above-mentioned spectral sensitizing dye used in the present invention can be directly dispersed in an emulsion. Further, these may be first dissolved in a suitable solvent such as methyl alcohol, ethyl alcohol, methyl cellosolve, acetone, water, pyridine or a mixed solvent thereof, and added to the emulsion in the form of a solution. The dye is usually added after chemical sensitization in many cases, but it may be added during grain formation or before chemical sensitization. Ultrasonic waves can also be used for dissolution.

Additions to emulsions are described in US Pat. No. 2,612,343
No. 3,342,605, No. 2,996,287, No. 3,429,
The method described in No. 835 is also used. The above-mentioned spectral sensitizing dye may be uniformly dispersed in the silver halide emulsion before being coated on a suitable support, but as described above, it may be dispersed at any stage of preparation in the silver halide emulsion. Can be dispersed.

Furthermore, other sensitizing dyes can be used in the present invention. For example, U.S. Pat.
No. 2, No. 2,688,545, No. 3,397,060, No. 3,615,
635, 3,628,964, British Patent 1,242,588,
No. 1,293,862, Japanese Patent Publication No. 43-4936, No. 44-14030,
No. 43-10773, U.S. Pat.No. 3,416,927, Japanese Patent Publication No. 43-493.
No. 0, U.S. Pat.Nos. 3,615,613, 3,615,632, 3,617,295, and 3,635,721 may be used, and the infrared sensitizing dyes and spectral sensitizers thereof may be used. A dye can also be used in combination.

In the present invention, the compounds described in JP-A-63-89838 can be used together with the above-mentioned sensitizing dye for the purpose of further enhancing the supersensitizing effect.

Furthermore, in addition to the sensitizing dyes described above
Storage stability improvers such as those described in 63-89838 can be used in combination in amounts of from about 0.01 to 5 grams per mole of silver halide in the emulsion.

The supersensitizer or storage improver used in the present invention may be dispersed directly in the emulsion, and may be dispersed in a suitable solvent (eg, water, methyl alcohol, ethyl alcohol, propanol, methyl cellosolve, acetone, etc.). )
Alternatively, these solvents can be dissolved in a mixed solvent containing a plurality of solvents and added to the emulsion. The sensitizing dye can be added to the emulsion in the form of a solution or a dispersion in a colloid according to the method of adding the sensitizing dye.

The supersensitizer and storage stability improver may be added to the emulsion before or after the addition of the above-mentioned spectral sensitizing dye. Further, these spectral sensitizing dyes may be separately dissolved and added to the emulsion separately and simultaneously, or they may be mixed and then added to the emulsion.
These spectrally sensitized emulsions may be mixed emulsions or may be separately coated in separate layers.

The photographic light-sensitive material of the present invention has a manufacturing process,
Various compounds can be added in order to prevent sensitivity deterioration and fog generation during storage or processing.

These compounds include nitrobenzeneimidazole, ammonium chloroplatinate, 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene, 1-phenyl-5-mercaptotetrazole, and many other complex compounds. An extremely large number of compounds such as ring compounds, mercury-containing compounds, mercapto compounds and metal salts have long been known. One example of a compound that can be used is C.I. E. K. M
"The Thoery of the Photographic Process" by ees
(3rd ed., 1966) pp. 344-349 with the original references. For example, U.S. Pat.Nos. 2,131,038 and 2,69
Thiazolium salts described in 4,716, etc .; Azaindenes described in US Pat. Nos. 2,886,437 and 2,444,605; Urazoles described in US Pat. No. 3,287,135; US Pat. No. 3,236,652, etc. Described in U.S.A .; British Patent No. 62
Oximes described in US Pat. No. 3,448; US Patent No.
2,403,927, 3,266,897, 3,397,987 and other mercaptotetrazoles, nitrones, nitroindazoles; US Pat. No. 2,839,405 and other polyvalent metal salts (Polyvalent metal sal
ts); Thiuronium salts described in US Pat. No. 3,220,839 and the like; US Pat. No. 2,566,26
Examples include palladium, platinum and gold salts described in No. 3 and No. 2,597,915. Moreover, you may add in the form of what is called those precursors.

The silver halide crystal plane of the emulsion used in the present invention may be either the (100) plane or the (111) plane.
The ratio of (00) plane / (111) plane is preferably 1 or more. (1
The monodisperse silver halide emulsion grains having a (00) plane / (111) plane ratio of 1 or more can be prepared by various methods.

The most general method is to keep the pAg value during grain formation at a constant value of 8.10 or less, and to mix the silver nitrate aqueous solution and the alkali halide aqueous solution at a speed faster than the dissolution rate of the particles and at a rate at which re-nucleation is not large at the same time. It is a method of adding (so-called control double jet method). More preferably, the pAg value is 7.80 or less, and even more preferably the pAg value is 7.
It should be 60 or less. When silver halide grain formation is divided into two processes of nucleation and its growth, the pAg value during growth is preferably 8.10 or less, more preferably 7.80 or less, and further preferably 7.60 or less. The method of reacting the soluble silver salt and the soluble halogen salt may be a one-sided mixing method, but the simultaneous mixing method is preferable in order to obtain good monodispersity.

The silver halide emulsion used in the present invention is
The silver halide grains having a (100) face / (111) face ratio of 1 or more, preferably 2 or more, and more preferably 4 or more are contained in an amount of preferably 50 wt% or more, and 60 wt% or more. It is more preferable that the content is 80 wt% or more.

The inclusion of iridium ions is achieved by adding an aqueous solution iridium compound (eg, hexachloroiridium (III) acid salt or hexachloroiridium (IV) acid salt) in the form of an aqueous solution during the preparation of the silver halide emulsion. Let It may be added by being contained in the same aqueous solution as the halide for grain formation, addition before grain formation, addition during grain formation, or addition from after grain formation to washing with water, but preferred is This is an addition when forming particles. It is particularly preferable to embed it inside the particles.

In the present invention, it is necessary to use iridium ions in the amount of 10 ^-7 to 10 ^-3 mol per 1 mol of silver halide for the preparation of emulsions, preferably 5 × 10 ^{-7 to} 5 × 10 ⁴
It is a mole.

The silver halide emulsion of the present invention can contain various other photographic additives generally used. As the stabilizer, for example, triazoles, azaindenes, quaternary benzothiazolium compounds, mercapto compounds, or water-soluble inorganic salts such as cadmium, cobalt, nickel, manganese, gold, thallium, and zinc may be contained. Further, as a hardener, for example, aldehydes such as formalin, glyoxal, mucochloric acid, S-triazines, epoxies, aziridines, vinyl sulfonic acid, etc., or as a coating aid, for example, saponin, sodium polyalkylene sulfonate, polyethylene glycol laurin. Alternatively, oleyl monoether, amylated alkyl taurine, fluorinated compound and the like may be contained. Further, it is possible to contain a color coupler. In addition, a whitening agent, an ultraviolet absorber, an antiseptic, a matting agent, an antistatic agent, etc. can be added as required.

A dye, a so-called filter dye, may be incorporated in the silver halide emulsion of the present invention.
The filter dye may be separately applied to each layer of the emulsion, or may be separately applied to different layers such as an intermediate protective layer. Further, a plurality of dyes can be mixed and used.

The dye used in the present invention is preferably one having a main absorption in the visible wavelength region of the intrinsic light-sensitive wavelength region of the silver halide emulsion used. Among them, λmax is 450n
Dyes in the range m to 600 nm are preferred. There is no particular limitation on the chemical structure of the dye, and an oxonol dye, a hexoxonol dye, a merocyanine dye, a cyanine dye, an azo dye, etc. can be used, but in many cases, a water-soluble dye is used in order to eliminate the residual color after the treatment. Be beneficial. In addition, for the purpose of improving the silver tone by remaining after the treatment, for example, those which are not water-soluble (in a specific usage) are effective. Specifically, for example, pyrazolone dyes described in JP-B-58-12576, pyrazolone oxonol dyes described in U.S. Pat.No. 2,274,782, diarylazo dyes described in U.S. Pat.No. 2,956,879, U.S. Pat. 3,38
4,487, styryl dyes and butadienyl dyes, U.S. Pat.No. 2,527,583, merocyanine dyes, U.S. Pat.Nos. 3,486,897, 3,652,284, and 3,718,47.
No. 2 merocyanine dyes and oxonol dyes, US Pat. No. 3,976,661 enaminohemioxonol dyes and British Patents 584,609 and 1,177, 42
9, JP-A-48-85130, 49-99620, 49-114420
U.S. Pat.Nos. 2,533,472, 3,148,187, and
3,177,078, 3,247,127, 3,540,887,
The dyes described in Nos. 3,575,704 and 3,653,905 are used.

In the photographic emulsion layer or other hydrophilic colloid layer of the light-sensitive material of the present invention, a coating aid, an antistatic agent, a slipperiness improving agent,
Various surfactants may be contained for various purposes such as emulsion dispersion, prevention of adhesion and improvement of photographic characteristics (for example, development acceleration, hardening, sensitization).

For example, saponins (steroids), alkylene oxide derivatives (eg polyethylene glycol, polyethylene glycol / polypropylene glycol condensates, polyethylene glycol alkyl ethers or polyethylene glycol alkylaryl ethers, polyethylene glycol esters, polyethylene glycol sorbitan esters, Nonionics such as polyalkylene glycol alkylamines or amides, polyethylene oxide adducts of silicones), glycidol derivatives (eg alkenyl succinic acid polyglycerides, alkylphenol polyglycerides), fatty acid esters of polyhydric alcohols, alkyl esters of sugars, etc. Surfactants; alkyl carboxylates, alkyl sulfonates, alkyls Nzensurufon, alkylnaphthalene sulfonate, alkyl sulfates,
Carboxyl groups, sulfo groups, such as alkyl phosphates, N-acyl-N-alkyl taurines, sulfosuccinates, sulfoalkyl polyoxyethylene alkyl phenyl ethers, polyoxyethylene alkyl phosphates, etc. Anionic surfactants containing acidic groups such as phospho group, sulfate group, and phosphate group; amphoteric interfaces such as amino acids, aminoalkyl sulfonic acids, aminoalkyl sulfates or phosphates, alkyl betaines, amine oxides Activators; cationic amines such as alkylamine salts, aliphatic or aromatic quaternary ammonium salts, pyridinium, imidazolium and other complex salts, quaternary ammonium salts, and phosphonium or sulfonium salts containing aliphatic or complex salts. Agent It is possible to have.

Particularly, the surfactant preferably used in the present invention has a molecular weight of 60 described in JP-B-58-9412.
It is 0 or more polyalkylene oxides.

The polyalkylene oxide compound used in the present invention is an alkylene oxide having 2 to 4 carbon atoms, such as ethylene oxide, propylene-1,2-oxide, butylene-1,2-oxide, etc., preferably at least ethylene oxide. Condensation product of polyalkylene oxide consisting of 10 units and water, aliphatic alcohol, aromatic alcohol, aliphatic, organic amine, compound having at least one active hydrogen atom such as hexitol derivative, or polyalkylene of double or more Block copolymers of oxide and the like are included.

When these polyalkylene oxide compounds are added to the silver halide emulsion, they are dissolved in an aqueous solution having an appropriate concentration or in an organic solvent having a low boiling point which is miscible with water, at an appropriate time before coating. Preferably, it can be added to the emulsion after chemical ripening. Instead of being added to the emulsion, it may be added to a non-photosensitive hydrophilic colloid layer such as an intermediate layer, a protective layer and a filter layer.

The photographic emulsion of the present invention may contain a dispersion of a water-insoluble or sparingly soluble synthetic polymer for the purpose of improving dimensional stability. For example, alkyl (meth) acrylate, alkoxyalkyl (meth) acrylate,
(Meth) acrylamide, vinyl ester (for example, vinyl acetate), acrylonitrile and the like can be used alone or in combination.

In the emulsion used in the present invention, gelatin is mainly used as a protective colloid, and particularly inert gelatin is advantageously used. Instead of gelatin, photographically inactive gelatin derivatives (for example, phthalated gelatin) and water-soluble synthetic polymers such as potavinyl acrylate, polyvinyl alcohol, polyvinyl pyrrolidone, dextran and polyacrylamide are used.

Polyols such as trimethylolpropane, pentanediol, butanediol, ethylene glycol and glycerin can be used as plasticizers.

As the support of the present invention, for example, a film base such as cellulose acetate, cellulose acetate butyrate, polyester [eg poly (ethylene terephthalate)] and the like can be used.

In order to improve the adhesion to the hydrophilic colloid layer, it is preferable that the surface of the support be subjected to corona discharge treatment, glow discharge treatment or ultraviolet irradiation treatment. Alternatively, styrene-butadiene-based latex,
An undercoat layer made of vinylidene chloride-based latex or the like may be provided, and a gelatin layer may be further provided thereon.

An undercoat layer using an organic solvent containing a polyethylene swelling agent and gelatin may be provided.

By applying a surface treatment to these undercoat layers, the adhesion with the hydrophilic colloid layer can be further improved.

The silver halide emulsion of the present invention contains a developing agent such as hydroquinones; catechols; aminophenols; 3-pyrazolidones; ascorbic acid and its derivatives; reductones and phenylenediamines, or these. A combination of developing agents can be included. Developing agents can be incorporated in the silver halide emulsion layers and / or other photographic layers (eg protective layers, interlayers, filter layers, antihalation layers, back layers, etc.). The developing agent can be dissolved in a suitable solvent or added in the form of a dispersion described in US Pat. No. 2,592,368 and French Patent No. 1,505,778.

In the present invention, as a matting agent, US Pat. Nos. 2,992,101, 2,701,245 and 4,142,894 are used.
Homopolymers of polymethylmethacrylate or polymers of methylmethacrylate and methacrylic acid, organic compounds such as starch, and fine particles of inorganic compounds such as silica, titanium dioxide, strontium sulfate, and barium. it can. The particle size is preferably 1.0 to 10 μm, particularly preferably 2 to 5 μm.

Silicone compounds described in US Pat. Nos. 3,489,576 and 4,047,958 are used as a slip agent in the surface layer of the light-sensitive material of the present invention. In addition to the colloidal silica described in Japanese Patent Publication No. 56-23139, paraffin is used. Wax, higher fatty acid ester, dendritic powder derivative and the like can be used.

Any known method can be used for photographic processing of the light-sensitive material produced by applying the present invention. A known treatment liquid can be used. Treatment temperatures are usually chosen between 18 ° C and 50 ° C. Depending on the purpose, either development processing for forming a silver image (black and white photographic processing) or color photographic processing including development processing for forming a dye image can be applied. Among these treatments, a silver salt diffusion transfer method, a one-bath development fixing treatment method, a silver dye bleaching method and the like are included. For details, see Research Disclosure Vol. 176, No. 17643.
Development can be carried out by the method described on pages 28 to 29, Vol. 187, No. 18716, page 651, left column, right column.

In the case of performing ultra-rapid processing, it is preferable that the emulsion layer and / or the other hydrophilic colloid layer contain an organic substance which flows out in the development processing step. When the substance that flows out is gelatin, a gelatin species that is not involved in the crosslinking reaction of gelatin with a hardening agent is preferable, and examples thereof include acetylated gelatin and phthalated gelatin, and those having a small molecular weight are preferable.
On the other hand, as a polymer substance other than gelatin, US Pat.
Polyacrylamide as described in No. 271,158, or hydrophilic polymers such as polyvinyl alcohol and polyvinylpyrrolidone can be effectively used, and saccharides such as dextran, saccharose, and pullulan are also effective. Among them, polyacrylamide and dextran are preferable, and polyacrylamide is a particularly preferable substance. The average molecular weight of these substances is preferably 60,000 or less, more preferably 40,000 or less.

He-Ne laser (633 nm) and semiconductor laser
(780 nm), the dye in the antihalation layer should be 633 nm in addition to the above-mentioned sensitizing dye.
It is necessary to select those having sufficient absorption at 780 nm and 780 nm and to have a concentration of 0.4 or more at those wavelengths.

Further, in order to have suitability for both He-Ne laser (633 nm) and semiconductor laser (780 nm), it is necessary to have a concentration of 0.4 or more at 633 nm and 678 nm, respectively, together with the selection of the above-mentioned sensitizing dye. As the infrared absorbing dye, those described in JP-A-62-123454 and JP-A-62-181381 are preferable. Further, as the dye which absorbs in the visible region, those described in JP-A-61-174540 are preferable.

The antihalation dye-containing layer may be provided between the emulsion layer and the support or on the opposite side of the emulsion layer for the purpose of antihalation effect. It may be mixed or dispersed in the support. The transmission density of the dye-containing layer at the wavelength of the exposure light source is preferably 0.4 to 1.5. The method of adding the dye includes aqueous solution addition, micelle dispersion addition, solid dispersion addition, etc., depending on its nature.

The following compound examples can be given as specific examples of the antihalation dye of the light-sensitive material exposed by a light source of 360 nm to 700 nm.

[0102]

[Chemical 4]

As the antihalation dye and / or antiirradiation dye used in the present invention when the exposure light source is in the infrared region, a dye having a substantial absorption at a long wavelength of 750 nm or more is used. Here, the antihalation dye is used in an intermediate layer, an undercoat layer, an antihalation layer, a back layer, an emulsion layer and the like, and the antiirradiation dye is used in an intermediate layer and the like in addition to the emulsion layer. Further, these dyes are preferably 10 ^{−3 to 1} g / m ² , more preferably
It is used at an addition amount of 10 ^{−3 to} 0.5 g / m ² . For example, U.S. Pat.Nos. 2,895,955, 3,177,078, and 4,581,
No. 325, JP-A-50-100116, JP-A-62-123454, JP-A-62-181381 and dyes described in JP-A-63-23148 and JP-A-63-89838. Such dyes are preferably used. These dyes may be used alone or in combination of two or more.

Further, instead of the above dyes, or these dyes may be used in combination with other dyes. Examples of dyes used instead or in combination include, for example, pyrazolone oxonol dyes described in U.S. Pat.No. 2,274,782,
Diarylazo dyes described in U.S. Pat.No. 2,956,879,
Styryl dyes and butanedienyl dyes described in U.S. Pat.Nos. 3,423,207 and 3,384,487, and U.S. Pat.
Merocyanine dyes described in U.S. Pat. No. 3,486,897
No. 3,652,284 and No. 3,718,472, merocyanine dyes and oxonol dyes, and U.S. Pat.
The enaminohemioxonol dye described in No. 1 can be used.

Further, dyes described in JP-A-61-174540 can be mentioned.

Although the light-sensitive material has been described in detail above, the light-sensitive material used in the present invention is not limited to these as long as it has light-sensitive layers on both sides and the support is transparent.

[0107]

In the method of recording an image on the photosensitive material for laser recording having the photosensitive layers on both sides according to the present invention, since the laser scanning is performed from both sides of the photosensitive material, the scanning speed is maintained while maintaining a constant image density. Can be fast. The sharpness of the recorded image can be increased by using a light-sensitive material having an antihalation layer added.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an example of a laser recording photosensitive material used in the present invention and a conventional laser recording photosensitive material.

FIG. 2 is a schematic view showing an example of a laser scanning recording apparatus for recording an image on a laser recording photosensitive material used in the present invention.

[Explanation of symbols]

 1 Support 2 Photosensitive Layer 3 Protective Layer 4 Back Layer 5 Antihalation Layer 10 Photosensitive Material for Laser Recording 20,30 Laser Scanning Recording Unit

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Claims (1)

[Claims] 1. A method for recording an image on a photosensitive material for laser recording comprising a support transparent to visible light and photosensitive layers provided on both sides of the support and sensitive to laser light, the method comprising the steps of: A laser recording method, wherein an image is recorded so that the same image information is overlapped on each photosensitive layer by scanning different laser beams carrying the same image information on both sides of the photosensitive layer.